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Explanation:
In the context of United States law, originalism is a concept regarding the interpretation of the Constitution that asserts that all statements in the constitution must be interpreted based on the original understanding of the authors or the people at the time it was ratified.
Pros and cons
Pros
•If a constitution no longer meets the exigencies of a society's "evolving standard of decency", and the people wish to amend or replace the document, there is nothing stopping them from doing so in the manner which was envisioned by the drafters: through the amendment process. The Living Constitution approach would thus only be valuable in the absence of an amendment process.
•Originalism deters judges from unfettered discretion to inject their personal values into constitutional interpretation. Before one can reject originalism, one must find another criterion for determining the meaning of a provision, lest the "opinion of this Court [rest] so obviously upon nothing however the personal views of its members". Scalia has averred that "there is no other" criterion to constrain judicial interpretation.
•Originalism helps ensure predictability and protects against arbitrary changes in the interpretation of a constitution; to reject originalism implicitly repudiates the theoretical underpinning of another theory of stability in the law, stare decisis.
•Contrary to critics of originalism, originalists do not always agree upon an answer to a constitutional question, nor is there any requirement that they have to. There is room for disagreement as to what original meaning was, and even more as to how that original meaning applies to the situation before the court. But the originalist at least knows what he is looking for: the original meaning of the text. Usually, that is easy to discern and simple to apply.
Cons
•Legal controversy rarely arises over constitutional text with uncontroversial interpretations. How, then, does one determine the original "meaning" of an originally broad and ambiguous phrase? Thus, originalists often conceal their choice between levels of generality or possible alternative meanings as required by the original meaning when there is considerable room for disagreement.
•Originalism allows the dead hand of prior generations to control important contemporary issues to an extraordinary and unnecessary level of detail. While everyone agrees that broad constitutional principles should control, if the question is whether abortion is a fundamental right, why should past centuries-old intentions be controlling? The originalist's distinction between original meaning and original intention here is unclear due to the difficulty of discussing meaning in terms of specific details that the Constitutional text does not clarify.
•In writing such a broad phrase such as "cruel and unusual", it is considered implausible by some that the framers intended for its very specific meaning at that time to be permanently controlling. The purpose of phrases such as "cruel and unusual," rather, is specifically not to specify which punishments are forbidden, but to create a flexible test that can be applied over future centuries. Stated alternatively, there is no reason to think the framers have a privileged position in making this determination of what is cruel and unusual; while their ban on cruel punishment is binding on us, their understanding of the scope of the concept "cruel" need not be.
•If applied scrupulously, originalism requires the country either to continually reratify the Constitution in order to retain contemporary standards for tests such as "cruel and unusual punishment" or "unreasonable searches and seizures," or to change the language to specifically state that these tests shall be administered according to the standards of the society administering the test. Critics of originalism believe that the first approach is too burdensome, while the second is already inherently implied.
